As you may know from (Mario) The Music Box ARC: Insane Route, the Black Cat with blue and yellow eye name Len who is known at the Witch of Fate reveal in one of the ending that she was experimenting different version of Mario that came in the Mansion to investigation the missing peoples and freeing a spirit name Alice and went through the horror and trying not to die. Len watch and Observe Mario from making the wrong choice which lead to his death on his OWN will and curiosity. She even COMFRONT another version of Mario (If the player save the game and put Alice soul to rest) and told him EVERYTHING of the experiment deal that Mario past life name Marchionne made to be with Luciano and Aurora again but in another life as Mario, Luigi and Peach. For each time Mario die ANOTHER one is replace as a next SUBJECT. But now... The Witch of Fate Len is now doing that SAME experiment on Mario and Meggy as he observe Mario and Meggy WRONG choice that lead to there death including Luigi and Saiko. As Len always said... Curiosity kill the Cat and... Hope is for fool.

Mario and Meggy went to the mysterious mansion to investigation the rumor about peoples disappearance in the mansion. As they investigation they came across a Music Box but the moment Mario and Meggy touch it their investigation have turn into a nightmare, Mario and Meggy must escape this horror nightmare, dealing with Spirit and not dying. Mario and Meggy begin to uncover DARK secret about the Mansion and figuring out who these family are... Will they escape mansion or die together... But one thing for sure is... There is something evil deep inside Mario AND Meggy.